Motor-driven slicing machine



Feb. 23, 1932. 'J. VAN HOORN 1,846 924 MOTOR DRIVEN SLICING MACHINE Filed April 27, 1928 2 Sheets-Sheet 1 Feb. 23, 1932. J. VAN HOORN MOTOR DRIVEN SLICING MACHINE Filed April 27, 1928 2 Sheets-Sheet 2 Patented Feb. 23, 1932 UNITED m JETZE VAN 'noonn, or vooR- U Re, NETHERLANDS, ASL-seam "To MA- CHINE COMPANY, or LA ron'rE, INDIANA; a oonrone'rrou or I NDIAITA Moron-newer; sLioiire MACHINE I Application filed April2 7, 1928,. Serial no. 273,172, and in Great Britain May 4, 1827. I

This invention relatesto motor-driven slicing machines of the kind in which the substance to be sliced is carried past a rotary knife, toward which the substance can be fed either automatically in. the working of the.

'machine or by hand. y

In slicing certain substances, it is desirable to be able to slow down the rate of slicing j knife). I ,7 "With'the motor-driven machines used at present, such'slow'ing down would be accompanied by proportionate slowing down of I I the rotational speed of the knife,'this being disadvantageous. t

The present invention comprises a, slicing machineof the kind referred to in which the knife is rotated by an electric or-othermotor while the carriage for the substance to be sliced is also operated by the motor but through the intermediary of a slip-coupling, the arrangement being such that the. speed (that is, 'the speed'of the substance past the of the carriage and, consequently, the rat'e'ofslicing, can be varied by the operator to suit the substance being-sliced, the speed of the knife remaining constant.

Preferably, the parts are so arranged that, I

by pushing or pulling thezcarriage by hand While it is being reciprocated by the motor, the driving force. applied theretothrough the slip-coupling can be added: to or diminishedin order to vary the speed of. the car;

riage, 'so that the operator may varythe rate of slicing as desired,'this.being partic- I ul arly useful when slicing substancescontaininglayers of'soft fat, since the latter shouldnot be sliced; so quickly-as, say, firm A slicing machine forming one embodis '49 ment ofthe invention is illustrated by way of example in the accompanying drawings, in'whichrjI Figs. land 2 are elevations of the machine taken at right. angles to each otherf r Fig. 3. is a detail section view drawn to a larger scale, the section being on the line IIIIII of Fig. I

The slicing'inachine shown comprises a base 1 whereon is slidably mounted, in known manner, acarriage 2 provided with handle 3 and witha clamping'device 4' for holdingthe substance S to be sliced on a feed platefl5 mounted on the carriage 2and slidable trans- V versely thereof as usual. Feed-mechanism (not shown) of well-known construction would be provided for feedingthefeed-plate nected tofa sprocket. wheel lO on 'the knife,

the chain beingiindicated by the dotted line 11. The carriage 2 is coupledrtoajcrank 13 by a'connecting rod -14, the. crank 13 -being secured toethe upper endof a vertical crank: shaft 15 journalled inyahdpassing through, the base 1. 7 At its lower end, the. crankshaft 15 carries-abevel wheel 16 meshingawithfla bevel pinion 17-on a horizontal shaft 18' also journaled in the base l' andlpassin'g, to the exteriorthereof. 1 l r The crankshaft 15,; at a point subStan tially midway of its leng'th, carriesfja hori! zontal flywheel .19 (indicated in dottedlines in Fig. .1) and it has adrivingconnectionby the parts 18,26, 27 with the knife shaft 20, the connection including essentially a slip- I f' coupling 21, 22. One element 21=ofjthe-slip coupling is formed on, oris secured to, the horizontal shaft 18, while the other element 22 is freely mountedon the shaft 18 and is urged by a spring 23 (Fig. 3) to make fiic-- tionalrontact with the other element 21. The externalend of the shaft 18 is jour-' naled in a bush 24 presenting an abutment'for the-spring 23; The bush 24 is screw-threaded;

adjusting the bush, the'pressure of the spring and, consequently, the frictional grip the co-actin, v faces of the elenients, 2l ,r22,=can "be.

adjusted. The element 22 has securedto it the ;whioh latter is driven by thechain gear 10,

11, 9 from the motor 8.

r The elements 21,22, .or of may I into aboss 25 rigid with the basal anchby be faced in known manner with friction materialb v I InEthe working of the m achine,-'when. cTut ting a piece of substance the nature of which slip-coupling inoperative. Thereafter, the

varies, the knife will maintain a constant rotational speed, whereas, by virtue of the slipcoupling, thespeed of the carriage 2 may be varied by the operator according to the kind of substance being sliced; For this purpose, the operator may grasp the handle 3, and may either assist the motor to reciprocate the carriage or retard the speed thereof to suit the nature of the substancefbeing sliced. 5

If desired, the bush'24 might be slackened back to an extent which would render the carriage could bereciprocated by hand, while 7 the knife could be motor-driven or might remain at rest, this latter arrangement being desirable for the cutting of cheese. Further, for the purpose of sharpening the knife in knownmanner, the carriage might remain at rest while the knife couldbe rotated by the motor. V p

It is to be understood tht tithe slicing machine illustrated has been chosen simply by way of example, and that the invention could be readily applied to other types ofslicing machines. For instance, the invention might f be applied to slicing machines of the type in which the knife is driven by a motoras in the the knife would maintain a constant rotational speed and, by virtue of the slip-coupling, the operator could vary the slicing speed, in accordance with the nature of the substance, by means of the flywheel F.

Moreover, the slip-coupling shown has been chosen simply for the purposes ofillustration and it may be modified in construction without departing fromthe scope of the invention.

Iclaim: 1. In a slicingmachine the combination with'a rotating slicing knife of a reciproeating work table, a source of power operatively connected to said knife and'table to drive the same, said connection to said table including a slip-coupling comprising two members in engagement with each 'otherbut movable relativeyto each other when said table is retarded'or, ac'celeratedby manual force supplied thereto, said members being moved 1 relatively to each. I other without destroying the operative connection therebetween, and manual meanson said table for applying a manual force thereto for the purposeof moving said table at a greater or lesser speed than that at which the table is normally driven from said source of power without destroying the driving connection therebetween. i

2. In a slicing machine the combination with a rotating slicing knife of a work table, mechanism for reciprocating said table, a source of power connected to saidknife for operating saidmechanism, said mechanism including a shaft geared to said table, fixed and movable friction members on said shaft, said movable member being connected to'said: source of power, said friction members being movable relative to each other whenever the speed of the friction member fixed to said shaft is varied from the speed imparted thereto by said source of power, and manually operable means on the carriage;for: selectively operating said friction member fixed to said shaft at a speed greater or less than the speed at which said movable friction mem-L her is driven by said source of power without destroying said driving connection between saidjmembers. v

A slicing machinev having a rotating slicing knife, a work table, a frame, a shaft journaled in said frame, a gear on saidishaft, one end of said .shaftfbein'g. operatively con nected to said table to reciprocate the same, a second shaft journaledin said frame, a second gear on said second shaft meshing with said first gear, said second shaft having a friction member secured thereto and a co-operati'ng friction member rotatab-lymounted thereon, a nut adjustable on said shaft, a'spri'ng between said nut and rotatably mountedfric- 'tion member, a power wheel'fixed-to' said loosely mounted member, a source of power, a

connection between said source'of power and said wheel, and a connection between said knife and said source of power for driving said knife, said nut being adpi stable to vary the amount of force necessary to rotate said friction members relative .to each other, for a given force manually applied to said table for the purpose of acceleratingor retarding the normal speed given tosaid table by the operative connections between said table and said source of power, manually operable means on s-aidtable for selectively operating said. first mentioned friction member at a greater or lessspeed thanthe speed at which the movable friction member is drivenby said source of power, said friction members maintaining their driving relation to each other even when manual'force is applied thereto to increase or decrease the normal reciprocation thereof. x r

In testimony whereof I have signed-iny name to thisspecification on this 12th day of- April 1928. I 1 i JETZE vAv HOORN. 

